Research On Ethernet-based Real-Time Control Bus Communication System For Intelligent Vehicles

This research is based on the FPGA chip integrated with clock module,Ethernet interface and CAN interface module,etc.,to establish the Ethernet controller integrated circuit and the hardware platform that can implement the upper layer software communication protocol.Based on this platform,the relevant on-board communication protocols are improved to meet the communication needs of the automotive intelligent control system.For audio and video transmission system,UDP/IP protocol stack is established to meet the demand of large data and high real-time transmission of each application module;for real-time information transmission system with high communication quality requirements,the protocol of CANOPEN is used as the standard,and the working principle of object dictionary is analyzed,and the mapping part is redefined,and new control information codes are planned and compiled,which are used in vehicle bus and The communication transmission of the vehicle Ethernet is improved based on the classic data link layer communication mode of Ethernet,and the new communication mode of request-response as well as timed active reporting is reformulated.It also adopts suitable time and action synchronization mechanism,thus improving the efficiency between each slave node and master node in the in-vehicle network and achieving accurate and efficient communication purpose.